Problem with a simple function that return a number

Question

Hi,
I'm writing a function that return a number. I receive always an error (invalid number) but I don't understand why.
The function is this:
>
FUNCTION COUNT_OBJECT(workflow_name_p IN NUMBER, object_type_p IN VARCHAR2) RETURN NUMBER
IS
object_inserted NUMBER;
BEGIN
object_inserted := 0;
IF workflow_name_p = 'AIMDailyIngestorWorkflow'
THEN
object_inserted := 1;
else
object_inserted := 100;
END IF;
RETURN object_inserted;
END COUNT_OBJECT;
I have left only an if and an assignment because I do not find the error.
When I execute the function I receive always this error:
ORA-01722: invalid number
01722. 00000 - "invalid number"
*Cause:   
*Action:
There are not operation, only assignment I cannot understand.
Could someone help me?
Thanks bye bye.

Answer 1

I changed in this way:
FUNCTION COUNT_OBJECT(workflow_name_p IN VARCHAR2, object_type_p IN VARCHAR2) RETURN NUMBER
IS
object_present NUMBER;
object_inserted NUMBER;
table_name_p VARCHAR2(4000);
query_stmt VARCHAR2(4000);
BEGIN
IF workflow_name_p = 'AIMDailyIngestorWorkflow'
THEN
SELECT SUM(B.STOREDOBJS) INTO object_present
FROM DPCTJOBTYPESTATS B
WHERE B.WORKFLOW_NAME = workflow_name_p AND B.OBJTYPE=object_type_p;
SELECT 'AIM.'||B.TABLE_NAME INTO table_name_p
FROM DPCTSWOBJTYPE B
WHERE B.OBJTYPE=object_type_p AND SOFTWARE='AIM';
EXECUTE IMMEDIATE 'SELECT COUNT(*) FROM ' || table_name_p || ';' INTO object_inserted;
object_inserted := object_inserted - object_present;
END IF;
RETURN object_inserted;
END COUNT_OBJECT;and now the error is:
ORA-00911: invalid character
ORA-06512: at "INFRA.WORKFLOW_STATISTICS", line 504
00911. 00000 - "invalid character"
*Cause:    identifiers may not start with any ASCII character other than
letters and numbers. $#_ are also allowed after the first
character. Identifiers enclosed by doublequotes may contain
any character other than a doublequote. Alternative quotes
(q'#...#') cannot use spaces, tabs, or carriage returns as
delimiters. For all other contexts, consult the SQL Language
Reference Manual.
but the line 504 is the blank line higlighted with the ***.
Why this error? The code seems correct.
Thanks, bye bye.